| 引用本文: | LIANG Yanmin,ZU Qingming,LIANG Xuhao,YE Zhoujun,SHI Wenfeng,LI Zongzhou,DONG Bin,JIANG Hao.Analysis on the Bonding Failure Mechanism of High Modulus Carbon Fiber Composites[J].上海航天,2022,39(1):129-136. |
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| Analysis on the Bonding Failure Mechanism of High Modulus Carbon Fiber Composites |
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LIANG Yanmin1,2, ZU Qingming3, LIANG Xuhao1,2, YE Zhoujun4, SHI Wenfeng1,2, LI Zongzhou1,2, DONG Bin1,2, JIANG Hao5
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1.Shanghai Composite Technology Co.， Ltd.， Shanghai 201112， China;2.Shanghai Aerospace Resin‐based Composite Engineering Technology & Research Center， Shanghai 201112， China;3.Shanghai Academy of Spaceflight Technology， Shanghai 201109， China;4.Shanghai Spaceflight Precision Machinery Institute， Shanghai 201600， China;5.Department of Engineering Mechanics， Dalian University of Technology， Dalian 116024， Liaoning， China
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| 摘要: |
| In order to explore the bonding failure mechanism of high modulus carbon fiber composite materials， the tensile experiment and finite element numerical simulation for single-lap and bevel-lap joints of unidirectional laminates are carried out， and the stress distributions， the failure modes， and the damage contours are analyzed. The analysis shows that the main reason for the failure of the single-lap joint is that the stress concentration of the ply adjacent to the adhesive layer is serious owing to the modulus difference， and the stress cannot be effectively transmitted along the thickness direction of the laminate. When the tensile stress of the ply exceeds its ultimate strength in the loading process， the surface fiber will fail. Compared with the single-lap joint， the bevel-lap joint optimizes the stress transfer path along the thickness direction， allows each layer of the laminate to share the load， avoids the stress concentration of the surface layer， and improves the bearing capacity of the bevel-lap joint. The improved bearing capacity of the bevel-lap joint is twice as much as that of the single-lap joint. The research in this paper provides a new idea for the subsequent study of mechanical properties of adhesively bonded composite materials. |
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1.Shanghai Composite Technology Co.， Ltd.， Shanghai 201112， China;2.Shanghai Aerospace Resin‐based Composite Engineering Technology & Research Center， Shanghai 201112， China;3.Shanghai Academy of Spaceflight Technology， Shanghai 201109， China;4.Shanghai Spaceflight Precision Machinery Institute， Shanghai 201600， China;5.Department of Engineering Mechanics， Dalian University of Technology， Dalian 116024， Liaoning， China
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